Preparation method of TC4 titanium alloy thin-wall ring material

The invention relates to the field of metal material processing, in particular to a preparation method of a TC4 titanium alloy thin-wall ring material, which is characterized in that a TC4 titanium alloy cast ingot is sequentially subjected to bar billet forging, bar billet drilling, cross piercing, first-time machining, rolling, second-time machining, precision forging, annealing treatment and third-time machining to obtain a finished product of the TC4 titanium alloy thin-wall ring material. The TC4 titanium alloy thin-wall ring material prepared through the method is good in structure uniformity and good in batch stability, the tensile strength Rm ranges from 990 Mpa to 1050 Mpa, the specified non-proportional extension strength Rp0.2 ranges from 920 Mpa to 980 Mpa, the percentage elongation A after fracture ranges from 13% to 19%, and the reduction of area Z ranges from 40% to 48%. The method has the advantages of being high in material utilization rate, good in product structure uniformity, good in batch